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# Check integrity of raid6 in degraded modes
# Create a 5 disk raid6, dump some data to it, then
# sha1sum it with different pairs of devices failed
if [ "$INTEGRITY" != "yes" ]; then
echo -ne 'skipping... '
exit 0
fi
layouts='ls rs la ra'
lv=`uname -r`
if expr $lv '>=' 2.6.30 > /dev/null
then
layouts="$layouts parity-first ddf-zero-restart ddf-N-restart ddf-N-continue \
left-asymmetric-6 right-asymmetric-6 left-symmetric-6 right-symmetric-6 parity-first-6"
fi
for layout in $layouts
do
mdadm -CR $md0 -l6 --layout $layout -n5 $dev0 $dev1 $dev2 $dev3 $dev4
check wait
tar cf - /etc > $md0
sum=`sha1sum $md0`
totest=
for second in $dev0 $dev1 $dev2 $dev3 $dev4
do
mdadm $md0 -f $second
mdadm $md0 -r $second
blockdev --flushbufs $md0
sum1=`sha1sum $md0`
if [ "$sum" != "$sum1" ]
then
echo $sum does not match $sum1 with $second missing
exit 1
fi
for first in $totest
do
mdadm $md0 -f $first
mdadm $md0 -r $first
blockdev --flushbufs $md0
sum1=`sha1sum $md0`
if [ "$sum" != "$sum1" ]
then
echo $sum does not match $sum1 with $first and $second missing
exit 1
fi
mdadm $md0 -a $first
while ! (check state 'U*_U*'); do check wait; sleep 0.2; done
done
mdadm $md0 -a $second
while ! (check state 'U*'); do check wait; sleep 0.2; done
totest="$totest $second"
done
mdadm -S $md0
done
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